AEC 1426-i Twin-Shear Granulator - Manual (Page 24)

1426-i Granulator Chapter 5: Maintenance 23 of 37
Adjusting Belt Tension
For continuous reliable operation of the granulator, it is important that the belt tension is
correct. Correct tension reduces wear on rotor and motor bearings and keeps belt slip to a
minimum. Figure 2 gives the recommended force to deflect each belt by an amount equal to
the belt span divided by 64. A gauge is available through the sales department to measure the
deflection and force. Use the following procedure to adjust the belt tension:
Note: The deflection force value shown must be multiplied by the number of V-belt
elements.
1. Turn off the granulator at the main isolator switch and remove fuses.
2. Remove the cover to gain access to the belts, and remove the right side and rear base
panels to gain access to the motor base.
3. Turn the adjusting screw on the motor slide base to tension the belts as required (See
Figure 2).
4. Re-tighten the screws, making sure the pulleys are in correct alignment.
5. Replace the covers.
Figure 2: Belt Tensioning Information
Belt Cross Section Standard Motor Sheave Deflection Force,
Lbs./V-Belt Element*
5 V Banded 8.5 O.D. 16 Min.
*This deflection force value relates to a single V-belt element. Therefore, if the belt is a 3-V
element (3V-banded), this value must be multiplied by 3.
Deflection = Belt Span = 0.58”
64
Belt Span=37”